Need to add lost original text translation

[taehwanno]

Related to #270 (comment)

When I'm resolving syn pull request #270, I find that some original text are lost. we need to add translation.

• English
• Korean

React.Component's componentDidCatch

Production and development builds of React slightly differ in the way componentDidCatch() handles errors.

On development, the errors will bubble up to window, this means that any window.onerror or window.addEventListener('error', callback) will intercept the errors that have been caught by componentDidCatch().

On production, instead, the errors will not bubble up, which means any ancestor error handler will only receive errors not explicitly caught by componentDidCatch().

[taggon]

Closed as this issue has already been resolved by #280